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Large Pillow Block and Pulley Avoid Removal in Mining Application with Bearing Isolators

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Inpro-Seal Large Pillow Block and Pulley Avoid Removal in Mining Application

Large Pillow Block and Pulley Avoid Removal in Mining Application with Bearing Isolators

Challenge

A large SDCD 23176 Pillow Block with a 14.173 in. (360 mm) shaft diameter was experiencing premature failure due to
contamination ingress of water, dust and bitumen. This was due to tremendous amounts of shaft misalignment and axial movement causing the seals on both sides to wear quickly. The customer would introduce significant amounts of grease into the seals to act as a purge and assist in sealing. This method had minimal results as the seals only lasted approximately three months.

Inpro-Seal Large Pillow Block and Pulley Avoid Removal in Mining Application (2)

Inpro/Seal Pillow Block Bearing Isolator Installation

Solution

Inpro/Seal® Bearing Isolators were installed on the inboard side of the pillow blocks. Inpro/Seal Bearing Isolators are
non-contacting compound labyrinth seals with no wearing parts that permanently protect bearings from contamination ingress or lubrication loss. These particular Bearing Isolators were flange mounted for easy installation and utilized an articulating rotor to handle angular misalignment and axial shaft movement.

Inpro-Seal Large Pillow Block and Pulley Avoid Removal in Mining Application (3)

Result

The seals were installed in April 2019 and have been running successfully with no contamination issues. The pillow block and pulley do not have to be removed due to constant premature failure, decreasing downtime and maintenance
costs. Due to the success of these seals, equipment maintenance can now be planned and scheduled.

Inpro-Seal Large Pillow Block and Pulley Avoid Removal in Mining Application (1)

Inpro/Seal Bearing Isolator installed on SDCD 23176 Pillow Block

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